Spectrophotometric observations of thiacyanine dye J-aggregation on citrate capped silver nanoparticles

• Authors: Bojana B. Laban , Vesna Vodnik , Vesna Vasić
• Languages of publication: EN

Abstracts

EN

The J-aggregation of anionic cyanine dye, 5,5’ –
disulfopropyl-3,3’ – dichloro - thiacyanine sodium salt (TC)
in the presence of 2x10-3 M KCl and citrate capped silver
nanoparticles (AgNPs, diameter ~10nm) was investigated.
The influence of added salt (KCl), as well as AgNPs and
TC concentration on the intensity of the absorption bands
with the maxima at 464 and 481 nm, characteristic of the
J-aggregation of the dye in solution and on AgNPs surface,
respectively, was studied. The spectrophotometric and
fluorescence spectra confirmed that AgNPs induced the
decomposition of J-aggregates formed in solution on the
account of their formation on NPs surface. The obtained
results enabled the evaluation of number of TC molecules
per AgNPs participating in J-aggregate formation. The
experimental results yielded about 320 molecules of TC
per AgNPs in at least three layers in a slanted orientation.

Keywords

EN

Silver nanoparticles; cyanine dye; J-aggregation

• Publisher: De Gruyter Open
• Journal: Nanospectroscopy
• Year: 2014
• Volume: 1
• Issue: 1

Dates

received

21 - 7 - 2014

online

27 - 5 - 2015

accepted

4 - 2 - 2015

Contributors

author

Bojana B. Laban

• Department of Chemistry, Science University of
  Priština, 38220 KosovskaMitrovica, Serbia

author

Vesna Vodnik

• Vinča Institute of Nuclear
  Sciences, University of Belgrade, P.O. Box 522, Belgrade, Serbia

author

Vesna Vasić

• Vinča Institute of Nuclear
  Sciences, University of Belgrade, P.O. Box 522, Belgrade, Serbia

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Identifiers

DOI

10.1515/nansp-2015-0004